Valve reseating apparatus



AUS 11, 1942 i A. G. LIEBMANN 2,292,383

VALVE RESEATING vAPPRATUS Filed April 9. 1941 MAQ Patente-d Aug. 11, 1942 UNHTED STATES PATENT OFFICE VALVE RESEATING APPARATUS jointly Application April 9, 1941, Serial No. 387,760

3 Claims.

This invention is directed to an improvement in valve reseating apparatus wherein more particularly provision is made for trapping and completely removing, in the removal of the apparatus from the valve, any and all debris developed ,5'

in the reseating or cutting of the valve durin the operation of the apparatus.

Valve reseating tools are ordinarily employed to be applied to the valve to be treated and operated to reseat, cut or otherwise lim'sh a valve seat. During the reseating or grinding operation, there is necessarily developed a certain amount of debris cut or ground from the valve surface, and including the grinding compound, where such is employed, which will gravitate below the valve with consequent liability of reaching and possibly aiiecting the proper operation of the mechanism in the apparatus beyond the valve. It is obviously desirable to prevent any of this debris from being uncontrollably delivered below the valve during the reseating or other operation on the valve.

Therefore, the primary object of the present invention is to provide a valve reseating apparatus which, in addition to the valve reseating or cutting tool and the means for operating the same, is provided with an element serving as a receptacle or cup which, in the positioning of the apparatus for use is disposed below the valve treating tool in a position to receive and retain all and any debris developed in the operation of the tool on the valve seat, with the further provision that such cup, with the accumulated debris, is wholly removed from the vicinity of the valve seat in the disconnection of the apparatus.

Through this provision of the cup there is no possibility of any such developed debris from reaching the interior mechanism below the valve seat, and thus one of the well-understood and objectionable results of grinding the valve seat by conventional heretofore proposed apparatus is entirely eliminated.

A further object of the invention is to provide an apparatus for reseating the valve in unit 45 form, capable of being positioned and removed without separation of the parts, and including an association of elements which provide for accurately positioning the cup, the grinding tool with necessary adjustment of the latter and also including external means by which the grinding tool can be properly operated.

The invention is illustrated in the accompanying drawing, in which Figure 1 is a longitudinal section, partly in elevation, showing the improvement in applied position.

Figure 2 is a plan of the same.

Figure 3 is a broken elevation of the upper portion of the operating means.

Figure 4 is an enlarged transverse section showing the mounting of the basket in the valve.

Figure 5 is an enlarged broken vertical section, partly in elevation, showing the relation of the valve, tool, and basket.

The improved apparatus comprises a base plate I, shaped to cooperate with that portion of the valve body 2 occupied by the usual removable bonnet, which bonnet (not shown) is removed y to permit the use of the improved apparatus.

The base plate is formed with openings 3 corresponding to the openings for receiving the bonnet connections, so that the base plate may be rigidly secured to the valve body in the use of the apparatus.

The base plate is provided with a depending hollow guide 4 centrally arranged with respect to the base plate and provided interiorly with upper and lower bearingv sleeves 5 and 6 to accurately receive and guide the stem l on the lower end of which is secured the reseating tool 8. It is understood in this connection that the tool 8 may be of any desired form for cutting, reseating or otherwise treating the valve surface 9 of a valve ID which is ordinarily secured removably at the appropriate point in the body I, and further formed with inwardly extending diametrically opposite lugs II. The tool stem 'I extends above the base plate andat its upper end is preferably reduced in diameter to provide a stem I2. The base plate I is provided with a bridge I3 supported by upstanding struts I4 rising from the base plate, which bridge is formed with an internally threaded central opening I5 in line with the guide 3. An adjusting head I6 is threaded into the opening I5 and formed at its lower end with an opening I1 to rotatably receive the reduced extension I2 of the tool stem 1.

The opening I'I is diametrically enlarged throughout the upper portion of the adjusting head IB as at I8 and all this enlarged portion I8 is interiorly threaded. The reduced portion I2 of the tool stem 'I extends into the lower part of the enlarged opening I3 and is provided with a ball bearing or other antifriction bearing I9, and above the bearing with a pressure disk 20. A plug 2l is threaded into the enlarged opening I8 and bears upon the disk 20 thereby fixing the tool stem 'I against independent axial movement with respect to the adjusting head IE, but permitting free rotation of the stem 1 independently of the head. The adjusting head is provided with an enlarged upper end 22 by which the adjusting head may be operated and the plug 2| is provided with a nut-form terminal 23 by which the plug may be applied and removed.

The tool 8, stem 1, reduced portion l2 of the stem and plug 2l are so formed as to provide an axially ranging channel 24 extending completely therethrough. A rod 25 is mounted for free longitudinal movement in the channel 24, which rod is formed at its upper end with a convenient element 26 by which the rod may be operated, between which element and the nut end 23 of the plug 22 is arranged a coil spring 2l. The lower end of the rod 25 depends below the tool 8 and is provided with a chip cup or receptacle 28. This receptacle, preferably but not necessarily of metal, is of relatively shallow depth and corresponds to the opening within the innerv limit of the valve seat 9. The cup thus includes a bottom 29 through which the rod 25 extends, and below which bottom the rod is headed, as at 3D, or otherwise provided to prevent free downward movement of the cup. The side wall 3l of the cup is preferably convergent upwardly -to a relatively narrow edge 32 and this wall 3| is formed at appropriate points with recesses 33 toV snugly t over the lugs Il of the valve member.

Owing to the size and shape `of the cup, it will accurately fit the inner margin defined bythe valve seat, and any debris falling from such valve seat into the cup will be naturally retained by the cup and prevented from passing below the cup.

While it is obvious that any desired means capable of operating the tool 8 at the desired speed may be employed, I prefer, largely for convenience in operation, to provide a hand operated element which will permit the tool to be operated at a large variety of selected speeds, which may be independently best fitted for the lparticular work to be performed. In providing such means, the worml gear 34 is mounted on the tool stem 'l above the base plate l, the worm gear having a pin entering a slot 35 in the tool stem to permit independent axial movement of the stem independent of the worm wheel as is necessary. The driving worm pinion 36 is supported in bearings 31 rising from the base plate and cooperates with the worm gear to rotate'the tool stem and thereby the tool. The worm pinion 36 is mounted upon a shaft 38 which extends beyond the periphery of the base plate I and is provided with a removable grip handle 39 by which it may be operated.

In the use of the apparatus, the valve bonnet is removed and the base plate placed in position of such bonnet. In this placement, the cup 28 is moved down through the valve seat and to a position below the same. The lugs Il fit the recesses 33 in the cup and guide the same. The base plate is then fixed to the body valve, and the adjusting head operated through the medium of its threaded connection with the bridge to lower the tool 8 into cooperation with the valve seat. The rod 25 is then drawn upwardly to ensure that the cup is in its uppermost position during the reseating operation. Following the grinding vor reseating operation, the base plate l is'released from the valve body, the entire apparatus drawn upwardly to a unit until free of the valve body.

It will be apparent that the cup serves as an effective barrier for the downwardly escaping of any debris developed in the operation of the tool 8, and not only prevents such downward passage of the debris, but receives and completely retains such debris during the complete valve seating operation, so that the debris which would be otherwise delivered into the Working parts controlled by the valve being ground, is eilectively removed.

The spring support of the cup arranged at the upper end provides for independent movement of the cup in vpositioning the same Without correspondingly aiecting the tool stem, and further permits a yielding of the cup during the use of the apparatus in the event such should become necessary for any reason.

The particular mounting of the .tool stem and cup, while preferably in the form shown, may obviously be constructed in other mechanical detail, and this applies with equal force for the driving means for the tool.l The essential and characteristic fact of the present invention is the provision of the cup, which may be applied as a unit with the resurfacing apparatus, and which may, when in place, will receive, accumulate or retain and permit removal with the appav ratus, of all debris developed in the, operation of the tool on the valve seat.

While the above specification is described more specifically in connection .withV the grinding function of the apparatus, it will be appreciated that it may be used for any purpose in connection with valve treatment, such as refacing, trueing, or any other operation, with of course, the use of an appropriate tool for the particular desired function. Y

W hat is claimed as new is:

l. A valve reseating apparatus including a tool for operating on the valve, a member on which the tool is rotatable, a cup carried bythe member below the tool to receive material cut by the tool and falling below the valve, and means cooperating with the cup to fix the same against rotation during operation ofthe tool.

2. Avalve reseating apparatus including a tool for operating extending longitudinally through the tool and with respect to the valve, a member on which the tool is rotatable, a cup carried by the member below the tool .to receive material cut by the tool and falling below the valve, and means cooperating with the cup to x the same against rotation during operation of the tool, and means for adjustingrthe member relative to the tool to thereby correspondingly adjust the cup relative tothe tool after the latter is in operative position. Y

3. A device for operating on a valve body having a valve seat and lugs below the seat, of a tool for operating on the valve seat, a member on which the tool is rotatable, and a cup carried by the member below the tool, said cup being fully open at its upper end and otherwise closed, and formed with recesses to engage the lugs in the valve body to hold the cup against -rotation during operation of the tool. v

AUGUSTG. LIEBMANN. 

